From: Liu Bo <bo.li.liu@oracle.com>
To: "Wang, Zhiye" <Zhiye.Wang@Arcserve.com>
Cc: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: freeze_bdev and scrub/re-balance
Date: Wed, 9 Dec 2015 09:21:43 -0800 [thread overview]
Message-ID: <20151209172143.GA30753@localhost.localdomain> (raw)
In-Reply-To: <CY1PR10MB0428E36B7C37C92740306A60E40B0@CY1PR10MB0428.namprd10.prod.outlook.com>
On Sat, Dec 05, 2015 at 09:57:18AM +0000, Wang, Zhiye wrote:
> Hi all,
>
>
> If I understand it correctly, defragment operation is done in user space tools, while scrub/re-balance is done in kernel thread.
Defragment is done via a IOCTL, so it also works in the kernel.
>
>
> So, if my kernel module calls freeze_bdev when scrub/re-balance is in progress, will I still be able to get a consistent file system state?
It should be like that with COW enabled.
Thanks,
-liubo
next prev parent reply other threads:[~2015-12-09 17:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CY1PR10MB0428B98E759584F476DB4CF3E40B0@CY1PR10MB0428.namprd10.prod.outlook.com>
2015-12-05 9:57 ` freeze_bdev and scrub/re-balance Wang, Zhiye
2015-12-09 11:01 ` Wang, Zhiye
2015-12-09 17:21 ` Liu Bo [this message]
2015-12-14 9:27 ` Wang, Zhiye
2016-01-07 22:14 ` Liu Bo
2016-01-08 3:13 ` Wang, Zhiye
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